Richard vosb



(No Model.)

B. VOSE.

GAR SPRING. No. 350,174. Patented O0t.5,1886.

WITNESSES llVl/E/VTOH A 'rroR/vsy N. FUERS PhckbLfibugnphur, Washington. D. c.

ATENT QFFICE.

RICHARD VOSE, OF NIH" YORK, N. Y.

CAR-SPRING.

TZQNfonning part of Letters Patent No. 350,174,:dated October 5,1886.

Application filed September 30, L884. Serial No. Itiitl (No model.)

To all whom it may concern:

Be it known that I, RIcHiRD'Vosn, a citizen of the United States, and a resident of the city, county, and State ofNew York, have invented certain new and useful Improvements in Oar-Springs, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to that class of carsprings in which a plurality of spiral coils, arranged the one within and concentric to the other, are employed, and especially to that class illustrated in Letters Patent No. 214,328, its object being to simplify and cheapen the construction of parts shown therein, and to produce a spring in which the interior coil shall be supported at both its upper and its lower ends.

\Vith this objectin view my invention consists in the combination, with the exteriorand interior coils, of a baseplate and a top plate or cap, the former of which plates is provided with means for holding the lower end of the interior coil, and the latter with devices for supporting the upper endthereof, all as hereinafter described.

Referring to the drawing, wherein my invention is illustrated in sectional elevation, A and B are the exterior and interior coils, respectively, both of which are or may be constructed in the usual way by winding rods or bars of the proper sizes and cross-sections about suitably-formed mandrels. These coils may be either cylindrical or conical in, form,

' or, if preferred, one may be cylindrical and the other conical, the form, however, selected by me for the illustrationof my invention being that in which the two coils are conical. The coil A rests upon the base-plate H, which is preferably constructed in annular form, and has projecting upwardly around the central circular aperture formed therein the circumferential flange J, which enters the interior of said coil and holds it in place and from lateral movement thereon. The coil B, which is preferably made somewhat shorter than the coil A, is arranged within and. concentric to the latter, it being supported therein by the disk I and held from all transverse movement by the upwardly -projecting circumferential flange J, which embraces its lower end.

L is the top plate or cap, which rests upon the upper end of the coil A and is held in proper position thereon. by the circumferential flange 0, projecting downward from its under side and engaging with the interior surface of said coil. Centrally of this top plate or cap and from its under side depends the sleevelikc portion M, which enters the upper end of the interior coil, 13, and serves as a guide therefor to prevent it from moving across its axis and into contact with the coil A. This slcevelike portion is provided with a recess or chamber, S, to receive and accommodate the head G of the bolt E, which bolt passes down through the aperture 7; in the lower end, a, of said sleevelike portion, through the interior coil, B, and through the disk I, in a recess formed in the under side of which it is secured by a nut, G, and serves to retain the parts of the spring in their proper relation respecting one another when once assembled. The disk I, upon which the .intcrior coil rests, is arranged loosely within the lower end of the cup-shaped portion of the base-plate H, formed by the upwardly projecting flange J, and is held from moving up into the same by the in clined walls thereof, or, if prelerrcd, by arabbet formed in the lower end of the same, in which said disk enters and is held.

The parts being constructed and arranged as above set forth, pressure applied to the top plate or cap will compress the exterior coil, A, the depending sleeve-like portion M of the former passing down within the interior coil, '3, and around the bolt E, the upper end of which, with its head G, moving up within the recess or chamber S. If the pressure applied be but slight, the exterior coil will be sufficiently powerful to carry it without the assist ance of the interior coil; but if it be great, the exterior coil will be compressed until the upper end of the interior coil impinges against the under side, \V,of the topplate or cap,when such interior coil will be brought into action and act as an auxiliary to the exterior coil in sustaining the same.

By the construction of parts above described I am enabled. to produce a spring which is not only extremely simple and compact in form and well adapted to the purpose for which it is intended, but one in which the interior coil ICO is firmly held from all lateral displacement at both its upper and lower ends. The independent disk I and its arrangement in connection with the other parts of the spring permits of the ready removal of the interior coil, B, when desired, by simply unscrewing the nut G from the bolt E and removing said disk.

I have shown in the drawing the interior coil, 13, as made somewhat shorter than the exterior coil, A, and this I consider the preferred construction, as I thereby produce a graduated spring which is adapted to the carrying of both light and heavy loads; but I do not limit myself thereto, as it is obvious that I may make such interior coil of the same length as the exterior coil and still be within the scope of my invention. I

Having thus described my invention and one form in which it is or may be carried into effect. what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination, with a base-plate constructed in annular form and provided around itsinner circular aperture with an upwardlyprojecting circumferential flange, and an exterior coil resting upon the base-plate outside of said flange, of an interior coil arranged within the circular aperture formed in said base plate and within the circumferential flange, substantially as described.

2. The combination, with an exterior coil and an interior coil, of a top plate or cap pro vided with a circumferential flange depending from its under side for engagement with the interior of the external coil, and a centrallyarranged sleeve-like portion which enters the upper end of the interior coil, substantially as described.

3. The combination, with a base-plate constructed in annular form and provided 'with an upwardly-proj ecting circumferential. flange around the central circular aperture formed therein, an exterior coil resting upon said base-plate outside the circumferential flange, an interior coil arranged Within said flange, and a disk for supporting said interior coil, of atop plate or cap having centrally-arranged depending sleeve-like portion, Which'enters the upper end of the interior coil and is provided with a recess or chamber and an apertn re, and a bolt passing through said aperture, through the interior coil, and through the disk, substantially as described.

4. The combination, with an exterior coni- L cal coil and an interior coil, of a top plate or cap provided with a sleeve-like portion depending from its under side and entering the upper end of the interior coil, substantially described.

5. The combination, with an exterior and an interior conical coil, of a base-plate made in annular form and provided with an upwardly-projecting circumferential flange extending up between the coils, substantially as described.

RICHD. VOSE.

Witnesses:

B. S. CLARK,

Guns. R. CLARKE. 

